Apparatus for making paper bags.



T. M. AVERY. APPARATUS FOR MAKING PAPER BAGS.-

7 APPLICATION .FILED mmzs, 1915. 1 1,630

. Y w. my 1 W. Z m .b To M i a v d S H 5 H. P W m W M T. M. AVERY.APPARATUS FOR MAKING PAPER BAGS.

APPLICATION FILED JAN-23.1915.

Patented June 29, 1915.

2 SHEETS-SHEET 2.

TRUE M. AVERY, F GLENS FALLS, NEW YORK, ASSIGNOR 'IO UNION BAG & PAIERCOMPANY, A CORPORATION OF NEW JERSEY.

Specification of Letters Patent.

APPARATUS FOR MAKING PAPER-BAGS.

Patented June 29, 1215..

Application filed January 23, 1915. Serial No. 3,854.

"is a clear, full, and exact description.

' This invention relates to apparatus for making paper bags,particularly those bags known as flat and notion bags, and one of ,theobjects of the invention is to provide means for severing the fiat papertube in such way as to produce a substantially clean out along the edgeof the lip or flap.

Another object is to improve the method of severing paper bags of theclass mentioned from a paper tube soas to produce the flaps orlipsybefore the bag is finished by a bottoming device.

Further objects are to provide an efiicient and practical machine forproducing bags of the class mentioned.

These being among the objects of the present invention, the sameconsists of certain features of novelty in apparatus for making paperbags, which will be hereinafter fully described and then particularlypointed out in the claims with reference to the accompanying drawingsillustrating a suitable embodiment of the invention and in which Figure1 is a plan view of so much of a paper bag machine as will sufiice toillustrate the present invention; Fig. 2 is a side elevation partly insection .on line 2-2 Fig. 1; Fig. 3 is an enlarged section on the line3*3 Fig.1; Fig.- 4 isa detailed front elevation of the two severingportions; and

Figs. 5 and 6 are respectively a plan and a.

longitudinal section on the line 66 Fig. 5

of a blank of a flat and notion bag made by the present improvements.

'Re'ferrin to the drawings, the frar'nev 1.0 of .a suitab e bag formingmachine isshown. as provided with a former plate 11- which extends inthe direction of travel of the flat paper tube .12 which isformedthereon the same being terminated by. a serrated or toothed edge11 so that said former plate constitutes a severing member. The tubularblanks which are out off from the paper tube are afterward led to abottoming device not shown) which makesfthe finished bag. The paper tube12-ii's drawn over the former by means of suitable draw rolls 13, 14,carried on shafts 15 and 15* mounted on frame 10, and is passed over thesevering edge 11 of the former, at which edge the straight transversecut is made at the front of the bag. This leaves the paper serrated ortoothed. It is, however, desirous to make the flap or lip "on the backof the bag as smooth as possible, to which end there are incorporatedwith the described parts instrumentalities which cooperate therewith formaking the said flap or lip.

Beyond the severing member 11, 11, there is located a pair of pinchrolls 16, 17, which are suitably mounted on the machine, the function ofthese being to pinch the paper tube and hold it taut, while abreaker-bar 45 mounted on a well known part passes through the gapbetween the serrated edge ll and the said pinch rolls in order toseparate the tube into blanks.

Associated with the severing member 11, 11, is a bowed blade or knife 18provided along one edge with serrations or teeth 19. which, like theteeth 11 of the member 11, extend transversely of the path, of movementof the paper tube 12, except that the said blade or knife is adapted tobe presented edgewise with its serrations or teeth 19 toward thesevering member 11, whilethe said blade or knife is so bent that it isadapted to form a flap or lip, when associated with suitableinstrumentalities. In Figs. 5 and 6 a flat bag blank 20 is shown. whichis provided with serrations 21, 21, formed at each end of one wall,while at one end of the other wall a flap or lip 22 is provided, and atthe opposite end'of said other wall there is arecess or cut away portion23 which representsthe material removed to form the lip of anotherblank. It will be noticed that the edges of the flap or lip 22 and therecess 23 are substantially clean cut. This is in part accomplishedbypresenting the severing member 18 perpendicularly to the paper tubewhen the same is to. be severed. The

ieyergng position of member 18 is shown in The'mechanisniforoperatingthe flap or .lip forming SeVeri'ngmember-IB is as follows; AnarmQ-Qisprovided with a sleeve 25 which fits movably upon the shaft of theninchroll 16. Located on the sleeve 25 is a lug .26.: An arm -2Kextendsangularly with respect to the arm24,jand is provided with a sleeve 28which is adaptedto. fit over the end of sleeve-25 ,although said sleeve28 may be turned with-respect to the sleeve-2a To 1 permit this. a slot29 is located in a lateral extension 28 of sleeve 28, and through thisslot there passes a cap-screw 30 which screws into the lug 26. Thisaffords an adjustment for the arm 27 relatively to the arm 24 for apurpose to be hereinafter mentioned. An angular arm 31, 36, is mountedupon the arm 27, to which end the said arm 27 is provided with a grooveor recess32 into which fits the shorter arm 31 of the angle arm 31, 36,so that said shorter arm 31 can be slid endwise in said recess 32, inwhich said shorter arm 31 is rigidly yet adjustably fixed by means of aslot 33 in said part 31 and a bolt 35 which passes through. the arm 27and through said slot. The longer arm 36 of the said angle arm 31,36,extends inwardly and transversely of the machine and is provided with abowed or bent portion 37 into the concavity of which is fitted the bowedor bent severing blade or member 18, while screws 38 secure the saidparts together, and position the said severing mem} ber 18 properly withrespect to the paper tubing and the severing member 11'. It will benoticed fromFig. 1 that when the bowed severing member 18 is in activeposition it curves or bows away from the transverse serrated edge 11 ofthe former or severing member'll, while the ends of said blade orsevering member 18 terminate at points opposite the ends of the serratededge 11.

In other words, the span of the bowed blade or severing member 18 coversa distance equal to the length of the serrated edge 11. It will be seenthat means for properly adjusting the blade or severing member 18 areprovided by the adjusting screw nd bolt 30 and 35 respectively. By means0 the screw 30, the relative distance between the serrated edge of thesevering member 18 and the former or severing member 11 may be regulatedso that when the bladeor severing member 18 moves toward severing blade11, it will stop at the proper point. By means of the bolt 35, theadjustment of the serrated edge of the severing member 18 with respectto the serrated edge 11 may be regulated.

Means are provided for tending to urge the bowed severing member 18 awayfrom the former or severing member 11, such means preferably comprisinga helical tension spring 39 which is connected with the arm 24. In orderto cause the severing member 18 to stand perpendicularly with respect tothe paper and still permit the paper to pass on unobstructed after it issevered, it is necessary that the said severing member recede from thepaper. This is 7 preferably accomplished by rigidly mounting a block orabutment 40 upon the arm 24, the same preferably being composed ofhardened steel, and the said abutment or block 40 is adapted to workupon the cam 41 which is secured to the shaft of the pinch roll 17, andis provided with a cam projection 42 terminated by an abrupt shoulder43. Now it will be seen that as the said cam 11 turns in the directionof the arrow, its cam projection will force the arm 24: away from it,and that at the proper moment when the severing olade 18 is to recedefrom the paper, the lug or block 40 will snap behind the shoulder 43, ordrop oil of the cam projection. Theshoulder 4:3 is set at just the rightpoint of the rotary motion of the cam as that its disengagement from theabutment or block 40 and the re-- ceding of the severing member 18 willoccur just as the cut in the paper is finished by said severing member.The recedingof the severing member 18 allows the next blank following tocontinue on its course.

It will be seen from the above description that with properly timedparts, the severing member 18 will move perpendicularly toward the papertube" 12 and that when this movement is completed, the breaker-bar lfiwill force one wall 12 of the paper tube along a transverse line,against the serrated severing edge 11 of member 11 which will sever thesaid wall transversely, while a slight continued movement of the breakerbar 45 will press the other wall 12" of the paper tube against theserrated and perpendicularly presented edge 19 of severing 'member 18and by a continued movement cause the said wall 12 to be cut or tornalong a li'necoincident with the serrated edge 19. Thereby the lip orflap 22 of the bag blank will be formed with substantially clean cutedge as shown in Fig. 5. The blank which has been separated from thepaper tube will be carried by the pinch rolls 16, 17, to a suitablebottoming device. In order to hold the former or severing blade 11against movement when the paper is being cutpa transverse stripper-plate47 is mounted on the frame of the machine just behind the bowed severingmember 18. Said stripper-plate also prevents the paper from followingthe teeth of the serrated edge of member 18.

It is of course to be understood that the term paper bags is broadenough to include any other inclosure of paper or similar thecombination of a blade provided. with a series of cutting teeth, meansfor holding a piece of. material which is to be cut, means Y stantiallyright angles thereto, and means" for pressing said piece of materialonto said teeth while thus presented to said piece, so thatit will becut thereby.

2. In a machine for making paper bags, the combination of a transversesevering member over which a fiat paper-tube is adapted to pass, asecond transverse severing member movable' perpendicularly toward onewall of said tube, and means for moving the other wall of said tubeagainst the first said severing member and the first said wall againstsaid second severing member successively.

3. In a machine for making paper bags,

the combination of a transverse severing member over which a fiatpaper-tube is adapted to pass, a second transverse severing membercomprisin a' bowed serrated blade movable perpendicularly toward onewall of said tube, and means for moving the other wall of said tubeagainst the first said severing member and the first, said Wall againstsa1d second severing member successively.

4. In a machine for making paper bags,

the combination of a former member, over which a fiat paper-tube isadapted to pass, a transverse severing member comprising a bowed blade,means for moving said blade perpendicularly toward said former memher,and means for moving one wall of said tube against said blade.

5. In a machine for making paper bags, the combination of a formermember having a serrated transverse edge, over which a fiat-paper-tubeis adapted to pass, a transverse severing member comprising a bowedblade having a serrated cutting edge, means for moving said bladeperpendicularly with its said serrated edge toward said formermember',and means for moving one wall of said tube against said edge of saidformer member and the other wall against said edge of said blade.

6. In a machine for making paper bags, the combination of a bowed bladehaving a serrated edge, means'for presenting said blade perpendicularlytoward, and with its said edge against, one wall of a flat paper tube,and means for moving said wall against said edge.

7. In a machine for making paper bags, the combination. of a bowed bladehaving a serrated edge, means for presenting said blade perpendicularlytoward, and with its said edge against, one wall of a flat papertube,means for adjustingsaid blade laterally of itself, means for adjustingthe movement of said blade with respect to the position. of said tube,and means for moving said wall against said edge.

8. In a machine for making paper bags, the combination of a formermember having a transverse severing edge, and over which a flatpaper-tube is adapted to pass, a normally retracted transverse severingblade having the outline of a bag flap or lip, means for supportingsaidblade edgewise toward said former member, a movable trip cam formoving said blade edgewise toward said former member, and breaker meansfor moving'one wall of said tube toward the first said severing. edgeand the other wall of said tube toward said severing blade, to seversaid tube and form a flap or lip.

9. In a machine for making paper bags, the combination of a formermember having a serrated transverse severing edge, and

over which a flat paper-tube is adapted to pass in the direction inwhich the teeth of said member extend, a normally retracted transversesevering blade having a serrated edge disposed along the'outline of abag flap or lip, means for supporting said blade edgevvise toward saidformer member, a movable trip cam for moving said blade edgewise towardsaid former member, and breaker means for moving one wall of said tubetoward the first said severing edge and the other wall of said tubetoward said severing blade, to sever said tube and form a flap or lip,said cam being adapted to release said blade when said tube is severed.

Signed at Glens Falls, N. Y. this 18th day of December 1914.

TRUE M. AVERY. Witnesses:

WALTER A. CHAMBERS, Soorr B. Coons.

